Convertible Infinite Dress Infinity Size S (Black) Infinite Dress - one dress, more than 30 styles Made of Lycra by Dupont: machine washable, dries wrinkle free and ready to wear Size equivalents: Small (4-6), Medium (8-10), Large (12-14), Extra Large (16-18) Comes with instruction booklet See http://www.infinitedress.com/ for demo video